Invest in a camp oven (dutch oven) You can cook ANYTHING with one of those that you can cook in your kitchen, briquets are cheap, they don't take up much space...
We have an annual "Dinner Party at the Lake" every year cooking in these black pots...we've done a meatloaf flower with bread rolls and cobbler desert, We've done pulled pork enchiladas with Spanish rice, beans.... Chicken Marsala, bread rolls, stuffed mushrooms, salad, cake...
You get the idea. You can also do some pretty simple stuff.
If you aren't interested in learning dutch ovens, there's always soup, chili, sandwiches...
Here's a website that has GREAT people, and some totally awesome recipes and camp cooking tips and tricks...
http://www.camp-cook.com/